脉冲压变化的测量误差
Piet A H Wyffels1,2, Stefan De Hert3,4, Patrick F Wouters3,4
1Department of Basic and Applied Sciences, Ghent University, Corneel Heymanslaan 10, 9000, Ghent, Belgium. piet.wyffels@uzgent.be.
Journal of clinical monitoring and computing
|December 8, 2023
概括
脉冲压变化 (PPV) 计算中的测量错误在流体管理中带来了不确定性. 这项研究量化了这些错误,表明所有方法都有不同程度的偏差和不准确性,影响了临床解释.
科学领域:
- 关键护理医学 关键护理医学
- 麻醉学 麻醉学
- 心血管生理学心血管生理学
背景情况:
- 动态预加载参数,如脉冲压变化 (PPV),指导外科手术期间的流体管理.
- 临床决策因可变报告的截止值和PPV的"灰色地带"而复杂化.
- 在PPV计算中的测量误差以前没有得到量化,但可能会导致不确定性.
研究的目的:
- 量化和比较与计算PPV的不同算法相关的测量误差.
- 评估抽样时间对PPV测量不确定性的影响.
- 为解释PPV值提供一个框架,考虑偏差和精度.
主要方法:
- 利用了VitalDatabase中肝移植患者的血液动力学数据.
- 应用了三种不同的算法来计算PPV在1分钟的观察期内,采样持续时间不同.
- 采用最佳线性无偏预测作为参考PPV和贝叶斯模型来确定偏差,精度和模拟不确定性.
主要成果:
- 所有测试的PPV计算方法都表现出测量误差,差异偏差范围从-0.04%到1.64%,比例偏差范围从0.92%到1.17%.
- 在所有方法中都检测到受样本采集期影响的异种粘性.
- 模拟显示了基准PPV值和变化的显著预测范围,即使测量PPV为12%或1%的变化.
结论:
- 所有计算PPV的方法都与固有的测量不确定性有关.
- 在不同的PPV计算方法中,偏差和精度的程度有所不同,并受到采样参数的影响.
- 计算量化偏差和精度对于准确解释PPV值和临床实践变化至关重要.
相关概念视频
01:17Measurement of Blood Pressure
949
Assessing blood pressure is a standard procedure executed in virtually all medical environments. The method utilized today was established over a hundred years ago by an innovative Russian doctor, Dr. Nikolai Korotkoff. The soft ticking noise, known as Korotkoff sounds, heard while taking blood pressure readings results from turbulent blood flow within the vessels. The apparatus required for this procedure includes a sphygmomanometer, a blood pressure cuff attached to a gauge, and a...
949
01:21Sites for measruring blood pressure
1.8K
Blood pressure measurement is a fundamental clinical procedure, providing crucial data for assessing cardiovascular health. Among the various sites for this measurement, the brachial and popliteal arteries are predominantly utilized due to their accessibility and the reliability of their readings. This lesson delves into the anatomical significance, methodology, and considerations of measuring blood pressure at these locations.
The Brachial Artery: Primary Site for Blood Pressure Measurement
The Brachial Artery: Primary Site for Blood Pressure Measurement
1.8K
01:24Blood Pressure
3.1K
The movement of blood in a human body, commonly referred to as blood flow, is determined by the volume of blood that traverses a certain section of the bodily system per unit time. It is the rhythmic contraction of the heart's ventricles that primarily instigates this movement. As the ventricles contract, blood is forced into the prominent arteries, which then flow from areas of greater pressure to lower pressure areas. This movement continues into smaller arteries and arterioles and...
3.1K
01:28Special considerations while measuring blood pressure
725
When assessing blood pressure (BP), healthcare professionals must consider various factors and potential unexpected outcomes to ensure accurate readings and provide proper patient care. Adhering to these guidelines is essential to achieving the most reliable results.
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.
725
01:25Errors occurring during blood pressure monitoring
733
Blood pressure monitoring is a crucial clinical procedure in diagnosing and managing various cardiovascular conditions. Despite its significance, the accuracy of blood pressure measurements can be compromised by multiple factors, potentially leading to either falsely high or low readings. These inaccuracies are critical as they can significantly impact patient care. So, it is vital to understand these challenges deeply and adopt strategic approaches to minimize errors.
Several factors...
Several factors...
733
01:23Assessment of blood pressure in brachial artery(two-step method)
715
Measuring blood pressure is a fundamental skill in healthcare that aids in diagnosing and monitoring hypertension and other cardiovascular conditions. An aneroid sphygmomanometer, commonly used in clinical settings, offers a manual and precise method for blood pressure measurement. The technique for using this instrument involves specific steps that must be carefully executed to ensure accuracy. The following detailed description outlines a two-step technique for assessing blood pressure using...
715